<template>
  <view class="goods-item">
    <!-- 左侧的盒子 -->
    <view class="goods-item-left">
      <radio :checked="goods.goods_state" color="#c00000" v-if="showRadio" @click="radioClickHandler"></radio>
      <image :src="goods.goods_small_logo || defaultpic" class="goods-pic"></image>
    </view>
    <!-- 右侧的盒子 -->
    <view class="goods-item-right"  >
      <!-- 商品的名字 -->
      <view class="goods-name" @click="gotoGoodsDetail">{{goods.goods_name}}</view>
      <view class="goods-info-box">
        <view class="goods-price">￥{{goods.goods_price}}</view>
        <uni-number-box @change="numChangeHandler" v-if="showNum" :min="1" :value="goods.goods_count"></uni-number-box>
      </view>
    </view>
  </view>
</template>
<script>
  export default {
    props:{
      goods:{
        type:Object,
        default:{}
      },
      showRadio:{
        type:Boolean,
        // 如果外界没指定默认不展示
        default:false
      },
      showNum:{
        type:Boolean,
        // 如果外界没指定默认不展示
        default:false
      }
    },
    data(){
      return{
        // 定义默认的图片
        defaultpic:'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      }
    },
    methods:{
      gotoGoodsDetail(val){
        // 切换到详情页面
        uni.navigateTo({
          url:"/subpkg/goods_detail/goods_detail?goods_id="+this.goods.goods_id
        })
      },
      // 更改商品数量的自定义函数
      numChangeHandler(val){
        // 通过this.$emit()触发通过外界@绑定的num-change事件
        // 同时把商品的id和勾选状态作为参数传递给num-change事件处理函数
        this.$emit('num-change',{
          // 商品的id
          goods_id:this.goods.goods_id,
          // 商品最新的勾选状态
          goods_count:+val
        })
      },
      
      // radio自定义事件的回调
      radioClickHandler(){
        // 通过this.$emit()触发通过外界@绑定的radio-change事件
        // 同时把商品的id和勾选状态作为参数传递给radio-change事件处理函数
        this.$emit('radio-change',{
          // 商品的id
          goods_id:this.goods.goods_id,
          // 商品最新的勾选状态
          goods_state:!this.goods.goods_state
        })
      }
    }
  }
</script>
<style lang="scss">
  .goods-item{
    width: 750rpx;
    box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #e0e0e0;
    
    .goods-item-left{
      display: flex;
      justify-content: space-between;
      align-items: center;
      
      margin-right: 5px;
      .goods-pic{
        width: 100px;
        height: 100px;
        display: block;
      }
    }
    .goods-item-right{
      display: flex;
      flex: 1;
      flex-direction: column;
      justify-content: space-between;
      .goods-name{
        font-size: 13px;
      }
      .goods-info-box{
        display: flex;
        justify-content: space-between;
        align-items: center;
        .goods-price{
          color:#c00000;
          font-size: 16px;
        }
      }
    }
  }
</style>
